BIST 100 closes 348 points lower after MSCI freeze
Published on 10/16/2026 at 22:43 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSMSCI freeze drives broad selling
- BIST 100 closed at 11,722 points on October 16, down 348 points or 2.9 percent.
- MSCI froze selected Turkey index changes after transparency concerns emerged on October 15.
- Astor Enerji was the weakest BIST 100 stock, falling 10.0 percent.
- Turkey's central bank decision is scheduled for October 22, 2026, at 8:00 p.m. TRT.
BIST 100 closed at 11,722 points on October 16, losing 348 points or 2.9 percent, as MSCI froze selected changes to Turkish equity indexes. The decision followed concerns about market transparency and free-float calculations, CNBC-e reported.
Astor Enerji was the weakest BIST 100 stock, falling 10.0 percent at the close. Declining stocks outnumbered advancing stocks by 558 to 77, according to Investing.com.
Why did BIST 100 fall after the MSCI decision?
MSCI said on October 15 that it was freezing certain Turkish index changes until a further announcement. The measure covers new additions, increases in foreign inclusion factors and moves into larger index segments. The BIST 100 opened at 11,896 points, down 174 points from the previous close, as selling followed the announcement.
All BIST 100 sector indexes ended lower. Financial leasing and factoring fell 5.7 percent, while the banking index lost 1.9 percent and the holding index dropped 2.5 percent, Anadolu Agency reported.
Winners and losers in BIST 100
Winners and losers at the Istanbul close on October 16, 2026, according to Investing.com:
- Global Yatirim Holding up 0.6 percent.
- Akfen Renewable Energy up 0.5 percent.
- Borusan Birlesik Boru Fabrikalari up 0.3 percent.
- Astor Enerji down 10.0 percent.
- ODAS down 9.4 percent.
- Zorlu Enerji down 6.9 percent.
BIST 100 finishes the week 4.4 percent lower
The index traded between 11,653 points and 11,906 points during Friday's session. It finished the week 4.4 percent lower, after selling pressure pushed the benchmark to its lowest level of the week, Hibya reported.
What comes next for BIST 100
- October 19, 2026, 10:00 a.m. TRT: Turkey's short-term external debt data are scheduled for release, TradingView reports.
- October 22, 2026, 8:00 p.m. TRT: The Central Bank of the Republic of Turkey is scheduled to announce its policy decision, Minkabu reports.
BIST 100 price data for October 16, 2026
BIST 100 closed at 11,721.72 points on October 16, 2026, according to Investing.com. It fell 348 points or 2.9 percent from the previous close of 12,070.17 points. The index opened at 11,896.08 points and traded between 11,653.38 points and 11,905.80 points.
BIST 100 by the numbers on October 16, 2026
- Index: BIST 100
- Home exchange: Borsa Istanbul, Turkey
- Close on October 16, 2026: 11,722 points
- Change versus previous close of October 15, 2026: down 348 points (down 2.9 percent)
- Previous close: 12,070 points
- Open: 11,896 points
- Day high / day low: 11,906 points / 11,653 points
- Top gainer: Global Yatirim Holding up 0.6 percent
- Top loser: Astor Enerji down 10.0 percent
- Next scheduled event: October 19, 2026, 10:00 a.m. TRT: Turkey's short-term external debt data
